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https://www.readbyqxmd.com/read/29793209/effect-of-thermal-pretreatment-on-chemical-composition-physical-structure-and-biogas-production-kinetics-of-wheat-straw
#1
Asad Ayub Rajput, Zeshan, Chettiyappan Visvanathan
Hard lignocellulosic structure of wheat straw is the main hindrance in its anaerobic digestion. Thus, a laboratory scale batch experiment was conducted to study the effect of thermal pretreatment on anaerobic digestion of wheat straw. For this purpose, different thermal pretreatment temperatures of 120, 140, 160 and 180 °C were studied and the results were compared with raw wheat straw. Significant differences in biogas production were observed at temperature higher than 160 °C. Highest biogas yield of 615 Nml/gVS and volatile solids reduction of 69% was observed from wheat straw pretreated at 180 °C...
May 21, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29793067/performance-and-methane-fermentation-characteristics-of-a-pilot-scale-anaerobic-membrane-bioreactor-anmbr-for-treating-pharmaceutical-wastewater-containing-m-cresol-mc-and-iso-propyl-alcohol-ipa
#2
Zhaobo Chen, Xue Li, Dongxue Hu, Yubo Cui, Fuguang Gu, Fuquan Jia, Tingting Xiao, Haiyan Su, Jiao Xu, Haixu Wang, Pan Wu, Ying Zhang, Na Jiang
In this study, a pilot scale anaerobic membrane bioreactor (AnMBR) was operated for 80 days to treat pharmaceutical wastewater containing m-cresol (MC) and iso-propyl alcohol (IPA). The aim of the study is to investigate the performance and methane fermentation characteristics of AnMBR at different hydraulic retention time (HRT) (48, 36, 24, 18 and 12 h). The average total removal efficiencies of MC and IPA were 95%, 96% during the 80 days, which demonstrated that the AnMBR system performed well in the MC and IPA removal...
May 11, 2018: Chemosphere
https://www.readbyqxmd.com/read/29790747/characterization-of-the-potent-aroma-compounds-in-preserved-egg-yolk-by-gas-chromatography-olfactometry-quantitative-measurements-and-odor-activity-value
#3
Yu Zhang, Yuping Liu, Wenxi Yang, Jia Huang, Yingqiao Liu, Mingquan Huang, Baoguo Sun, Changlin Li
To characterize potent odor-active compounds in preserved egg yolk (PEY), volatile compounds were isolated by headspace solid-phase microextraction and solvent-assisted flavor evaporation. Gas chromatography-olfactometry (GC-O) and gas chromatography-mass spectrometry (GC-MS) analyses identified a total of 53 odor-active compounds by comparing the odor characteristics, MS data, and retention indices with those of reference compounds. Twenty-seven odorants were detected in at least 5 isolates that were extracted and analyzed by the same method, and their flavor dilution (FD) factors, ranging from 1 to 2048, were measured by aroma extract dilution analysis (AEDA)...
May 23, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29790345/characterization-of-the-major-odor-active-compounds-in-dry-jujubes-cultivars-by-application-of-gas-chromatography-olfactometry-and-odor-activity-value
#4
Zuobing Xiao, Jiancai Zhu
The volatile compounds of jujube (Ziziphus jujube Mill.) puree obtained from three cultivars: 'jinsixiaozao' (Y1), 'youzao' (Y2), and 'yuzao' (Y3) were analyzed by gas chromatography-olfactometry (GC-O), gas chromatography-mass spectrometry, GC-flame photometric detection, and nitrogen phosphorus detector. The results showed that a total of 37, 37, and 35 odor-active compounds were identified by GC-O in samples of Y1, Y2, and Y3, respectively. In addition, the odor activity value (OAV) was used to determine the important compounds...
May 23, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29789622/molecule-based-microelectromechanical-sensors
#5
Matias Urdampilleta, Cedric Ayela, Pierre-Henri Ducrot, Daniel Rosario-Amorin, Abhishake Mondal, Mathieu Rouzières, Pierre Dechambenoit, Corine Mathonière, Fabrice Mathieu, Isabelle Dufour, Rodolphe Clérac
Incorporating functional molecules into sensor devices is an emerging area in molecular electronics that aims at exploiting the sensitivity of different molecules to their environment and turning it into an electrical signal. Among the emergent and integrated sensors, microelectromechanical systems (MEMS) are promising for their extreme sensitivity to mechanical events. However, to bring new functions to these devices, the functionalization of their surface with molecules is required. Herein, we present original electronic devices made of an organic microelectromechanical resonator functionalized with switchable magnetic molecules...
May 22, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29788410/differentiation-between-pediatric-irritable-bowel-syndrome-and-inflammatory-bowel-disease-based-on-fecal-scent-proof-of-principle-study
#6
Sofie Bosch, Nora van Gaal, Roy P Zuurbier, James A Covington, Alfian N Wicaksono, Maarten H Biezeveld, Marc A Benninga, Chris J Mulder, Nanne K H de Boer, Tim G J de Meij
Background: The diagnostic work-up of pediatric irritable bowel syndrome (IBS) and functional abdominal pain-not otherwise specified (FAP-NOS) commonly includes invasive tests for discrimination from inflammatory bowel disease (IBD). As this carries a high burden on patients, an ongoing need exists for development of noninvasive diagnostic biomarkers for IBS and FAP-NOS. Several studies have shown microbiota alterations in IBS/FAP, which are considered to be reflected by fecal volatile organic compounds (VOCs)...
May 18, 2018: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/29788181/identification-of-aggregation-sex-pheromone-of-the-korean-monochamus-alternatus-coleoptera-cerambycidae-population-the-main-vector-of-pine-wood-nematode
#7
Hyo-Rim Lee, Sung-Chan Lee, Dong Ha Lee, Myunghee Jung, Jun-Hyeong Kwon, Min-Jung Huh, Dong-Soo Kim, Ji-Eun Lee, Il-Kwon Park
We confirmed an aggregation-sex pheromone of the Korean Monochamus alternatus Hope (Coleoptera: Cerambycidae) population, which primarily transmitted the pine wood nematode in Korea. Only the M. alternatus male emitted monochamol which has been previously reported in the Chinese M. alternatus population. In field attraction testing, the monochamol+α-pinene+ethanol combination attracted more M. alternatus adult beetles than traps containing only monochamol, ethanol, or α-pinene. The bark beetle aggregation pheromone compounds of ipsenol, ipsdienol, and ipsenol+ipsdienol, did not show synergistic effects with the monochamol+α-pinene+ethanol combination...
May 19, 2018: Journal of Economic Entomology
https://www.readbyqxmd.com/read/29787935/functional-characterization-of-the-eugenol-synthase-gene-rcegs1-in-rose
#8
Huijun Yan, Sylvie Baudino, Jean-Claude Caissard, Florence Nicolè, Hao Zhang, Kaixue Tang, Shubin Li, Shugang Lu
The floral volatile compound eugenol is an important constituent in many aromatic plants, being a floral attractant for pollinators as well as having antimicrobial activity. Rose flowers emit eugenol and its derivatives. We recently reported a eugenol synthase gene (RcEGS1) (JQ522949) that was present in petals of R. chinensis cv. Old Blush. RcEGS1 has its highest expression levels in the petals compared to other tissues; it has higher transcript levels at the developmental blooming stage and lower levels at budding and senescence stages...
May 10, 2018: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29787413/halving-the-volume-of-anaconda-evaluation-of-a-new-small-volume-anesthetic-reflector-in-a-test-lung-model
#9
Hagen Bomberg, Franziska Meiser, Philipp Daume, Martin Bellgardt, Thomas Volk, Daniel I Sessler, Heinrich V Groesdonk, Andreas Meiser
BACKGROUND: Volatile anesthetics are increasingly used for sedation in intensive care units. The most common administration system is AnaConDa-100 mL (ACD-100; Sedana Medical, Uppsala, Sweden), which reflects volatile anesthetics in open ventilation circuits. AnaConDa-50 mL (ACD-50) is a new device with half the volumetric dead space. Carbon dioxide (CO2) can be retained with both devices. We therefore compared the CO2 elimination and isoflurane reflection efficiency of both devices. METHODS: A test lung constantly insufflated with CO2 was ventilated with a tidal volume of 500 mL at 10 breaths/min...
May 21, 2018: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/29786860/effect-of-cold-plasma-on-maintaining-the-quality-of-chub-mackerel-scomber-japonicus-biochemical-and-sensory-attributes
#10
Jing Chen, Sheng-Zhe Wang, Jun-Yu Chen, Dong-Zhi Chen, Shang-Gui Deng, Bin Xu
BACKGROUND: Atmospheric cold plasma (ACP) has emerged as a potential alternative to traditional methods for non-thermal food decontamination. However, little data are available about ACP treatment for seafood. In this study, dielectric barrier discharge (DBD) was applied to generate CP, and the aim of the study was to investigate the effectiveness of DBD-ACP on improving the quality of chub mackerel on the basis of chemical, microbial, and sensory characteristics. RESULTS: The effect of DBD-ACP on the quality of chub mackerel (Scomber japonicus) during storage was examined...
May 21, 2018: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/29786662/study-on-the-discrimination-between-citri-reticulatae-pericarpium-varieties-based-on-hs-spme-gc-ms-combined-with-multivariate-statistical-analyses
#11
Yuying Zheng, Xuan Zeng, Wei Peng, Zhong Wu, Weiwei Su
Citri reticulatae pericarpium (CRP), the dried pericarps of Citrus reticulata Blanco and its cultivars, has been widely used in drugs and foods in China for centuries. In this study, an accurate and feasible analytical method based on HS-SPME-GC-MS coupled with multivariate statistical analyses was developed to comprehensively compare volatile compounds of pericarps derived from Citrus reticulata "Chachi" ("Guangchenpi" in Chinese, GCP) and other cultivars of Citrus reticulata Blanco ("Chenpi" in Chinese, CP)...
May 22, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29786620/the-effect-of-bottom-electrode-on-ferroelectric-tunnel-junctions-based-on-cmos-compatible-hfo2
#12
Youngin Goh, Sanghun Jeon
Ferroelectric tunnel junctions (FTJs) have attracted research interest as promising candidates for non-destructive readout non-volatile memories. Unlike conventional perovskite FTJs, hafnia FTJ offers many advantages in terms of scalability and CMOS compatibility. However, so far, hafnia FTJ has shown poor endurance and relatively low resistance ratio and these have remained the issue for real device applications. In our study, we fabricated HfZrO-based FTJ with various electrodes (TiN, Si, SiGe, Ge) and improved the memory performance of HfZrO-based FTJ by using the asymmetry of the charge screening lengths of the electrodes...
May 22, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29786171/root-bacterial-endophytes-confer-drought-resistance-and-enhance-expression-and-activity-of-a-vacuolar-h-pumping-pyrophosphatase-in-pepper-plants
#13
Gianpiero Vigani, Eleonora Rolli, Ramona Marasco, Marta Dell'Orto, Grégoire Michoud, Asma Soussi, Noura Raddadi, Sara Borin, Claudia Sorlini, Graziano Zocchi, Daniele Daffonchio
It has been previously shown that the transgenic overexpression of the plant root vacuolar proton pumps H+ -ATPase (V-ATPase) and H+ -PPase (V-PPase) confer tolerance to drought. Since plant-root endophytic bacteria can also promote drought tolerance, we hypothesize that such promotion can be associated to the enhancement of the host vacuolar proton pumps expression and activity. To test this hypothesis, we selected two endophytic bacteria endowed with an array of in vitro plant growth promoting traits. Their genome sequences confirmed the presence of traits previously shown to confer drought resistance to plants, such as the synthesis of nitric oxide and of organic volatile organic compounds...
May 22, 2018: Environmental Microbiology
https://www.readbyqxmd.com/read/29785657/novel-non-invasive-early-detection-of-lung-cancer-using-liquid-immunobiopsy-metabolic-activity-profiles
#14
Yochai Adir, Shoval Tirman, Shirley Abramovitch, Cynthia Botbol, Aviv Lutaty, Tali Scheinmann, Eyal Davidovits, Irit Arbel, Giora Davidovits, Sonia Schneer, Michal Shteinberg, Hagit Peretz Soroka, Ruven Tirosh, Fernando Patolsky
Lung cancer is the leading cause of cancer death worldwide. Survival is largely dependent on the stage of diagnosis: the localized disease has a 5-year survival greater than 55%, whereas, for spread tumors, this rate is only 4%. Therefore, the early detection of lung cancer is key for improving prognosis. In this study, we present an innovative, non-invasive, cancer detection approach based on measurements of the metabolic activity profiles of immune system cells. For each Liquid ImmunoBiopsy test, a 384 multi-well plate is loaded with freshly separated PBMCs, and each well contains 1 of the 16 selected stimulants in several increasing concentrations...
May 21, 2018: Cancer Immunology, Immunotherapy: CII
https://www.readbyqxmd.com/read/29784959/commercially-available-natural-benzyl-esters-and-their-synthetic-analogs-exhibit-different-toxicities-against-insect-pests
#15
Yan Feng, Jian Chen, Aijun Zhang
Benzyl methyl ester, also known as methyl benzoate (MB), is a volatile organic compound that exists naturally as a floral fragrance in many plants. Our behavioral bioassays show that MB and some of its naturally occurring and synthetic analogs kill insects at different life stages. Compared to commercial pesticides containing pyriproxyfen and acetamiprid, MB and some analogs are 1.3 to 3.4 times more toxic to gypsy moth larvae and brown marmorated stinkbug nymphs. The arthropod repellent DEET is also a benzyl ester, and shares the same chemical skeleton with MB...
May 21, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29784551/residual-byproducts-of-peroxide-crosslinked-vitamin-e-blended-ultrahigh-molecular-weight-polyethylene
#16
David A Bichara, Caitlin C O'Brien, Brinda N Doshi, Gunnlaugur P Nielsen, Ebru Oral, Orhun K Muratoglu
BACKGROUND: Wear resistance of ultrahigh molecular weight polyethylene (UHMWPE) is improved via ionizing radiation crosslinking and subsequent high temperature melting for improved toughness. Our group has previously reported that crosslinking can also be achieved chemically using organic peroxides. However, volatile peroxide byproducts are generated during consolidation. The purpose of this study was to quantify elution of volatile peroxide byproducts from UHMWPE before and after in vivo implantation, and to determine their effects on local tissues...
March 13, 2018: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29784366/raman-spectroscopy-for-wine-analyses-a-comparison-with-near-and-mid-infrared-spectroscopy
#17
Cláudia A Teixeira Dos Santos, Ricardo N M J Páscoa, Patrícia A L S Porto, António L Cerdeira, J M González-Sáiz, C Pizarro, João A Lopes
Routine wine analysis are commonly employed to ensure the quality and safety standards, and to meet consumers' demands and legal requirements. In the last decades, efforts have been done in order to replace the traditional analytical techniques by vibrational spectroscopic techniques such as near infrared (NIR) and mid infrared (MIR) spectroscopy. The potential of these techniques has already been proved by several studies that revealed their ability for the determination of several wine parameters with high levels of precision and accuracy...
August 15, 2018: Talanta
https://www.readbyqxmd.com/read/29784334/toasted-vine-shoot-chips-as-enological-additive
#18
Cristina Cebrián-Tarancón, Rosario Sánchez-Gómez, M Rosario Salinas, Gonzalo L Alonso, José Oliva, Amaya Zalacain
Different ways of vine-shoots revalorization have been proposed, but not in wine yet, as for example in the same way as oak chips are being used. In this work, vine-shoot samples were submitted to a thermogravimetric analysis to establish the temperature range for its lignin structure decomposition, resulting between 160 and 180 °C. Then, vine-shoot chips from Airén and Cencibel cultivars, with a particle size around 2.5-3.5 cm, were submitted to six toasting conditions: 160 °C and 180 °C for 45, 60 and 75 min...
October 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29784332/whey-acerola-flavoured-drink-submitted-ohmic-heating-bioactive-compounds-antioxidant-capacity-thermal-behavior-water-mobility-fatty-acid-profile-and-volatile-compounds
#19
Leandro P Cappato, Marcus Vinicius S Ferreira, Jeremias Moraes, Roberto P S Pires, Ramon S Rocha, Ramon Silva, Roberto P C Neto, Maria Inês B Tavares, Mônica Q Freitas, Flavio N Rodrigues, Veronica M A Calado, Renata S L Raices, Marcia C Silva, Adriano G Cruz
Whey acerola-flavoured drink was subjected to Ohmic Heating (OH) under different operational conditions (45, 60, 80 V at 60 Hz and 10, 100, 1000 Hz with 25 V, 65 °C/30 min) and conventional pasteurization (65 °C/30 min). Bioactive compounds (total phenolics, DPPH, FRAP, ACE levels), fatty acid profile, volatile compounds (CG-MS), thermal behaviors (DSC) and water mobility (TD-NMR) were performed. Reduction of frequency (1000-10 Hz) resulted in a lower bioactive compounds and antioxidant capacity of the samples, except for the DPPH values...
October 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29784326/changes-in-chemical-and-sensory-properties-of-amarone-wine-produced-by-penicillium-infected-grapes
#20
Giacomo Zapparoli, Marilinda Lorenzini, Emanuele Tosi, Michela Azzolini, Davide Slaghenaufi, Maurizio Ugliano, Barbara Simonato
There is very little information on effects of Penicillium on aroma of passito wine. This study analyzed chemical composition and sensory properties of Amarone wines produced from withered grapes artificially contaminated by P. expansum or P. crustosum. Changes in properties of the two wines were evident by comparing wines obtained from healthy and Botrytis cinerea infected grapes used as controls. Penicillium infection affected primary and volatile composition of Amarone wine. Sensory profiles of these wines, obtained by descriptive analysis, resulted in clear differences in the wines between themselves and the control wines...
October 15, 2018: Food Chemistry
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